Built-in circuitous smoke passage



Feb. 22,1949. R. WELLBQIRNI 2,452,4 6

BUILT-IN CIRCUITOUS SMOKE PASSAGE Filed Jan. 19, 1945' f atented Feb.22, .1949

UNITED STATES PATENT OFFICE.

BUILT-IN CIRCUITOUS SMOKE PASSAGE Starnes R. Wcllborn, Nashville, Tenn.

Application January 19, 1945,'Ser ial No. 573,553

1 Claim. 1

This invention relates to a cigarette tip, and has for one of itsobjects the production of a simple and eflicient means for providing along or circuitous smoke passage which is built-in or fitted into acompact amount of space at one end of a cigarette.

Another object of this invention is the production of a simple andefficient smoke filter tip for cigarettes, and the like, which isprovided with :a circuitous smoke passage to cause the smoke :fromburning tobacco to pass through a lengthy and irregular passage beforeentering the smok- .ers mouth.

Other objects and advantages of the present :invention will appearthroughout the following specification and claim.

In the drawing:

.Figure 1 is a plan view of a strip from which one form of tip isconstructed, certain parts being broken away;

Figure 2 is a plan view of an intermediate companion piece used inconstructing the tip;

Figure 3 is a fragmentary, longitudinal, sectional view taken on line3-3 of Figure 1;

Figure 4 is a transverse sectional view through the tip in the processof being rolled;

Figure 5 is a fragmentary perspective view of one of the corrugatedstrips and its companion piece of the form shown in Figure 2;

Figure 6 is an exploded view of the tip, the plug, and the cigarette;

Figure '7 is an enlarged fragmentary sectional view of one end of acigarette tip illustrating the position of the central closure.

By referring to the drawing, it will be seen that IE designates one typeof corrugated strip of paper or other suitable material which may beused in forming the filter tip 16. The strip i5 is provided withtransverse corrugations li. These transverse corrugations are connectedto provide a continuous serpentine smoke passage I8 extending from oneend of the strip it to the other, as shown in Figure 1. One end of thesmoke passage it is provided with an enlarged entrance opening l9, whichentrance opening extends to the forward edge of the strip l5 and to thecorner 2|. The opposite end of the smoke passage i8 is provided with asmoke outlet opening 22 similar in construction to the entrance openingl9.

A companion piece 23 of flat paper or other suitable material is fittedagainst the corrugated serpentine passage I8 in the manner shown inFigures 3 and 4, and the strip l5 and companion piece 23 are then coiledor rolled together as of a special holder.

In the form shown in Figure .1, the tip is placed at one end of thecigarette so that the entrance opening l9 abuts the tobacco in thecigarette and the outlet opening 22 is located at the outer end of thetip which enters the mouth of the smoker, It is preferable to plug orseal the center passage of the tip when the same is constructed and thismay be done by means of a sealing disc Z5 of paper or other materialwhich may be pasted in place as shown in Figure 7. i

By noting Figure 6 it will be seen that a .glisc 25 is adapted to bepasted in place over the cen: ter of the filter tip near the inner endof the tip so as to close the central portion of the tip at the pointthereof adjacent the tobacco in the cigarette 24. This will cause thesmoke to enter the tip lfi-note Figure 6--near the periphery of the tip,as at Ili In other words the smoke is drawn into the filter or tip itthrough the passage or passages located near the circumference of thetip l6 and the smoke comes out of the tip at its outer end or at thesmokers end near the center of the tip, in this way providing the longor circuitous passage within the filter or tip.

In view of the fact that the disc 25 which forms a closure at the centerof the tip it is fixed to the end of the filter or tip thereby providingthe smoke inlet near the outer circumference, a great degree of accuracyin placing of the disc 25 is not required. All that is necessary is toseal-off the central draft or block the central draft. In view of thesimplicity of the structure and the elimination of accurate closureplacement, the danger of duds in faultily manufactured filters iseliminated. It is not desired to restrict the present application to theparticular location of the disc 25, but the arrangement as illustratedis found to be preferable.

It should be noted that the structure shown in detail in Figure 5, thesmoke passage terminal serves a dual purpose:

1. It provides an enlarged, extended mouth or terminal at the opening ofthe passage;

2. It serves as an obstruction to prevent a direct smoke passages at theend of the cigarette which is placed in the mouth of the smoker wouldhave outlets near the center of the tip l6 and this is preferable due tothe fact that the moisture and pressure from the lips of the smokermight tend to seal-off or crush the corrugations near the periphery -andprevent the smoke from being discharged l-from the endof the cigarettetip it. Consequently, by placing the smoke outlet near the center thisdifiiculty is eliminated. It has been found that the draft upon thetobacco is sufiicient even when the passages are located in the manneras described.

Having described the claimed as new is:

An article of the class described comprisinga strip of material having aplurality of parallel transverse passageways extendingin a direction 22cm one vsiizleedge of the strip toward the opposite s1 e edge andterminating short'of said side n ent n h a is edges, "the (ends of thepassageways having alternateconnectionsnear said'side'edges to provideaserpentine, continuous, smoke conveying channel of greater lengththanthe length ofthe i-Numbe strip, said smoke conveying channel havinga smoke inlet at one end and at one side of the strip and having a smokeexit at the opposite end and upon the opposite side, said strip beingadapted to assume the form of a roll constituting a. cylindrical body,the parallel passageways of said smoke conveying channel thereofextending in a direction substantially perpendicular to the base of theformed cylindrical body.

- was "a twsens REFERENCES CITED The following references are of recordin the I D STATES PATENTS Date Bourgeois Dec. 19, 1882 Hill Dec. 19,1911 Delbey Aug. 19, 1919 :Muller :Mar. "24, 11936 L QRE QN PATENTNumber 6911mm a m 6. page

